public class JsonPatchDocumentFilter : IDocumentFilter
{
public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
{
var schemas = swaggerDoc.Components.Schemas.ToList();
foreach (var item in schemas)
{
if (item.Key.StartsWith("Operation") || item.Key.StartsWith("JsonPatchDocument"))
swaggerDoc.Components.Schemas.Remove(item.Key);
}
swaggerDoc.Components.Schemas.Add("Operation", new OpenApiSchema
{
Type = "object",
Properties = new Dictionary<string, OpenApiSchema>
{
{"op", new OpenApiSchema{ Type = "string" } },
{"value", new OpenApiSchema{ Type = "string"} },
{"path", new OpenApiSchema{ Type = "string" } }
}
});
swaggerDoc.Components.Schemas.Add("JsonPatchDocument", new OpenApiSchema
{
Type = "array",
Items = new OpenApiSchema
{
Reference = new OpenApiReference { Type = ReferenceType.Schema, Id = "Operation" }
},
Description = "Array of operations to perform"
});
foreach (var path in swaggerDoc.Paths.SelectMany(p => p.Value.Operations)
.Where(p => p.Key == Microsoft.OpenApi.Models.OperationType.Patch))
{
foreach (var item in path.Value.RequestBody.Content.Where(c => c.Key != "application/json-patch+json"))
path.Value.RequestBody.Content.Remove(item.Key);
var response = path.Value.RequestBody.Content.Single(c => c.Key == "application/json-patch+json");
response.Value.Schema = new OpenApiSchema
{
Reference = new OpenApiReference { Type = ReferenceType.Schema, Id = "JsonPatchDocument" }
};
}
}
}